/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty3.ts ===
declare function AssertType(value:any, type:string):void;
type Foo = (number | undefined)[] | undefined;

const foo: Foo = [1, 2, 3];
AssertType(foo, "Foo");
AssertType([1, 2, 3], "number[]");
AssertType(1, "int");
AssertType(2, "int");
AssertType(3, "int");

const index = 1;
AssertType(index, "int");
AssertType(1, "int");

if (foo !== undefined && foo[index] !== undefined && foo[index] >= 0) {
    foo[index] // number
AssertType(foo[index], "number");
AssertType(foo, "(union)[]");
AssertType(index, "int");
}


